Rating System for Embies used at HRC

[Tiny Dancer]

Can you explain the ratings that the embies are given at HRC? What's the "best" rating and so forth....Also does it make a difference in the pregnancy rate? Better rated emby = BFP in most cases?

[Persuing Lacey]

Bump, I'd like to know the answer to this too, especially because I have 6 GSN girls, all different grades, on ice.

[Liv]

I had 6 embies make it through PGD. 5 were blasts and were graded B/C, the other was a morula and it did not get it a letter grade.

[Dr. Potter]

Can you explain the ratings that the embies are given at HRC? What's the "best" rating and so forth....Also does it make a difference in the pregnancy rate? Better rated emby = BFP in most cases?

We use a system for day three embryos that is:
4=0% fragments
3=<10% fragments
2=10-20% fragments
1= >20% fragments
For blasts
The grading of blastocysts is complicated. It involved examining the inner cell mass and trophectoderm and grading them with a letter grade.
A=best
D=worst
I hope that this helps

[Tiny Dancer]

Thanks Dr. Potter!